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Finding the Fourth Proportional to 571.48, 788.40 and 338.56

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Solution

The fourth proportional to 571.48, 788.40 and 338.56 is: 467.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.48 : 788.40 = 338.56 : x
  2. Step 2: Convert to fraction form
    571.48/788.40 = 338.56/x
  3. Step 3: Cross multiply
    571.48x = 788.40 × 338.56
  4. Step 4: Simplify right side
    571.48x = 266,920.70
  5. Step 5: Solve for x
    x = 266,920.70/571.48
  6. Step 6: Final answer
    x = 467.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.